/ Thesaurus / W Synonyms of west nile encephalitis Find synonyms for: Noun1. West Nile encephalitis, encephalitis, cephalitis, phrenitisusage: encephalitis caused by the West Nile virus; can be fatal in humans and horses and birdsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language